package com.atguigu.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * 全局过滤器 GlobalFilter
 */
@Component
@Slf4j
public class RtGlobalFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        log.info("请求路径：{}", request.getURI());
        log.info("请求方法：{}", request.getMethod());
        log.info("请求参数：{}", request.getQueryParams());
        log.info("请求头：{}", request.getHeaders());
        long start = System.currentTimeMillis();
        //=====================前处理=====================

        return chain.filter(exchange).then(Mono.fromRunnable(() -> {
            //=====================后处理=====================
            long end = System.currentTimeMillis();
            log.info("请求耗时：{}ms", end - start);
        }));
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
